#ifndef _ASM_X86_PGTABLE_H
#define _ASM_X86_PGTABLE_H
+#include <asm/page.h>
+
#define FIRST_USER_ADDRESS 0
#define _PAGE_BIT_PRESENT 0 /* is present */
static inline int pmd_large(pmd_t pte)
{
- return (pmd_val(pte) & (_PAGE_PSE | _PAGE_PRESENT)) ==
+ return (pmd_flags(pte) & (_PAGE_PSE | _PAGE_PRESENT)) ==
(_PAGE_PSE | _PAGE_PRESENT);
}
+static inline pte_t pte_set_flags(pte_t pte, pteval_t set)
+{
+ pteval_t v = native_pte_val(pte);
+
+ return native_make_pte(v | set);
+}
+
+static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear)
+{
+ pteval_t v = native_pte_val(pte);
+
+ return native_make_pte(v & ~clear);
+}
+
static inline pte_t pte_mkclean(pte_t pte)
{
- return __pte(pte_val(pte) & ~_PAGE_DIRTY);
+ return pte_clear_flags(pte, _PAGE_DIRTY);
}
static inline pte_t pte_mkold(pte_t pte)
{
- return __pte(pte_val(pte) & ~_PAGE_ACCESSED);
+ return pte_clear_flags(pte, _PAGE_ACCESSED);
}
static inline pte_t pte_wrprotect(pte_t pte)
{
- return __pte(pte_val(pte) & ~_PAGE_RW);
+ return pte_clear_flags(pte, _PAGE_RW);
}
static inline pte_t pte_mkexec(pte_t pte)
{
- return __pte(pte_val(pte) & ~_PAGE_NX);
+ return pte_clear_flags(pte, _PAGE_NX);
}
static inline pte_t pte_mkdirty(pte_t pte)
{
- return __pte(pte_val(pte) | _PAGE_DIRTY);
+ return pte_set_flags(pte, _PAGE_DIRTY);
}
static inline pte_t pte_mkyoung(pte_t pte)
{
- return __pte(pte_val(pte) | _PAGE_ACCESSED);
+ return pte_set_flags(pte, _PAGE_ACCESSED);
}
static inline pte_t pte_mkwrite(pte_t pte)
{
- return __pte(pte_val(pte) | _PAGE_RW);
+ return pte_set_flags(pte, _PAGE_RW);
}
static inline pte_t pte_mkhuge(pte_t pte)
{
- return __pte(pte_val(pte) | _PAGE_PSE);
+ return pte_set_flags(pte, _PAGE_PSE);
}
static inline pte_t pte_clrhuge(pte_t pte)
{
- return __pte(pte_val(pte) & ~_PAGE_PSE);
+ return pte_clear_flags(pte, _PAGE_PSE);
}
static inline pte_t pte_mkglobal(pte_t pte)
{
- return __pte(pte_val(pte) | _PAGE_GLOBAL);
+ return pte_set_flags(pte, _PAGE_GLOBAL);
}
static inline pte_t pte_clrglobal(pte_t pte)
{
- return __pte(pte_val(pte) & ~_PAGE_GLOBAL);
+ return pte_clear_flags(pte, _PAGE_GLOBAL);
}
static inline pte_t pte_mkspecial(pte_t pte)
{
- return __pte(pte_val(pte) | _PAGE_SPECIAL);
+ return pte_set_flags(pte, _PAGE_SPECIAL);
}
extern pteval_t __supported_pte_mask;
+/*
+ * Mask out unsupported bits in a present pgprot. Non-present pgprots
+ * can use those bits for other purposes, so leave them be.
+ */
+static inline pgprotval_t massage_pgprot(pgprot_t pgprot)
+{
+ pgprotval_t protval = pgprot_val(pgprot);
+
+ if (protval & _PAGE_PRESENT)
+ protval &= __supported_pte_mask;
+
+ return protval;
+}
+
static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
{
- return __pte((((phys_addr_t)page_nr << PAGE_SHIFT) |
- pgprot_val(pgprot)) & __supported_pte_mask);
+ return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) |
+ massage_pgprot(pgprot));
}
static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
{
- return __pmd((((phys_addr_t)page_nr << PAGE_SHIFT) |
- pgprot_val(pgprot)) & __supported_pte_mask);
+ return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) |
+ massage_pgprot(pgprot));
}
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
* the newprot (if present):
*/
val &= _PAGE_CHG_MASK;
- val |= pgprot_val(newprot) & (~_PAGE_CHG_MASK) & __supported_pte_mask;
+ val |= massage_pgprot(newprot) & ~_PAGE_CHG_MASK;
return __pte(val);
}
#define pte_pgprot(x) __pgprot(pte_flags(x) & PTE_FLAGS_MASK)
-#define canon_pgprot(p) __pgprot(pgprot_val(p) & __supported_pte_mask)
+#define canon_pgprot(p) __pgprot(massage_pgprot(p))
static inline int is_new_memtype_allowed(unsigned long flags,
unsigned long new_flags)
static inline int pmd_present(pmd_t pmd)
{
- return pmd_val(pmd) & _PAGE_PRESENT;
+ return pmd_flags(pmd) & _PAGE_PRESENT;
}
static inline int pmd_none(pmd_t pmd)
{
/* Only check low word on 32-bit platforms, since it might be
out of sync with upper half. */
- return !(unsigned long)native_pmd_val(pmd);
+ return (unsigned long)native_pmd_val(pmd) == 0;
}
static inline unsigned long pmd_page_vaddr(pmd_t pmd)
return (unsigned long)__va(pmd_val(pmd) & PTE_PFN_MASK);
}
-static inline struct page *pmd_page(pmd_t pmd)
-{
- return pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT);
-}
+/*
+ * Currently stuck as a macro due to indirect forward reference to
+ * linux/mmzone.h's __section_mem_map_addr() definition:
+ */
+#define pmd_page(pmd) pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT)
/*
* the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD]
return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address);
}
+static inline int pmd_bad(pmd_t pmd)
+{
+ return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE;
+}
+
+static inline unsigned long pages_to_mb(unsigned long npg)
+{
+ return npg >> (20 - PAGE_SHIFT);
+}
+
+#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
+ remap_pfn_range(vma, vaddr, pfn, size, prot)
+
+#if PAGETABLE_LEVELS == 2
+static inline int pud_large(pud_t pud)
+{
+ return 0;
+}
+#endif
+
#if PAGETABLE_LEVELS > 2
+static inline int pud_none(pud_t pud)
+{
+ return native_pud_val(pud) == 0;
+}
+
static inline int pud_present(pud_t pud)
{
- return pud_val(pud) & _PAGE_PRESENT;
+ return pud_flags(pud) & _PAGE_PRESENT;
}
static inline unsigned long pud_page_vaddr(pud_t pud)
return (unsigned long)__va((unsigned long)pud_val(pud) & PTE_PFN_MASK);
}
-static inline struct page *pud_page(pud_t pud)
-{
- return pfn_to_page(pud_val(pud) >> PAGE_SHIFT);
-}
+/*
+ * Currently stuck as a macro due to indirect forward reference to
+ * linux/mmzone.h's __section_mem_map_addr() definition:
+ */
+#define pud_page(pud) pfn_to_page(pud_val(pud) >> PAGE_SHIFT)
/* Find an entry in the second-level page table.. */
static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
{
return (pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT;
}
+
+static inline int pud_large(pud_t pud)
+{
+ return (pud_flags(pud) & (_PAGE_PSE | _PAGE_PRESENT)) ==
+ (_PAGE_PSE | _PAGE_PRESENT);
+}
+
+static inline int pud_bad(pud_t pud)
+{
+ return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0;
+}
#endif /* PAGETABLE_LEVELS > 2 */
#if PAGETABLE_LEVELS > 3
static inline int pgd_present(pgd_t pgd)
{
- return pgd_val(pgd) & _PAGE_PRESENT;
+ return pgd_flags(pgd) & _PAGE_PRESENT;
}
static inline unsigned long pgd_page_vaddr(pgd_t pgd)
return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK);
}
-static inline struct page *pgd_page(pgd_t pgd)
-{
- return pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT);
-}
+/*
+ * Currently stuck as a macro due to indirect forward reference to
+ * linux/mmzone.h's __section_mem_map_addr() definition:
+ */
+#define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT)
/* to find an entry in a page-table-directory. */
static inline unsigned pud_index(unsigned long address)
{
return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address);
}
+
+static inline int pgd_bad(pgd_t pgd)
+{
+ return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE;
+}
+
+static inline int pgd_none(pgd_t pgd)
+{
+ return !native_pgd_val(pgd);
+}
#endif /* PAGETABLE_LEVELS > 3 */
#endif /* __ASSEMBLY__ */
git.samba.org / sfrench / cifs-2.6.git / blobdiff